Started work on parser, submit works correctly

Dockerfile

@@ -0,0 +1,16 @@
+FROM sbtscala/scala-sbt:eclipse-temurin-alpine-21.0.8_9_1.12.1_3.8.1 AS builder
+
+WORKDIR /usr/src
+COPY . .
+
+WORKDIR /usr/src/compiler
+
+RUN sbt clean assembly
+
+FROM eclipse-temurin:21
+
+WORKDIR /usr/src
+COPY --from=builder /usr/src/compiler/target/scala-3.8.1/compiler-assembly-0.1.0-SNAPSHOT.jar compiler.jar
+COPY ./compiler ./
+
+CMD ["java", "-jar", "compiler.jar"]

compiler/.dockerignore

@@ -0,0 +1 @@
+target

compiler/build.sbt

@@ -6,6 +6,8 @@ lazy val root = project
     name := "compiler",
     version := "0.1.0-SNAPSHOT",
 
+    mainClass := Some("compiler.main"),
+
     scalaVersion := scala3Version,
     libraryDependencies ++= Seq(
       "org.scalameta" %% "munit" % "1.0.0" % Test,

compiler/project/plugins.sbt

@@ -1,2 +1,7 @@
 // In project/plugins.sbt. Note, does not support sbt 0.13, only sbt 1.x.
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.6")
+
+// Source - https://stackoverflow.com/a/30576584
+// Posted by shutty, modified by community. See post 'Timeline' for change history
+// Retrieved 2026-02-06, License - CC BY-SA 3.0
+addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "2.3.1")

compiler/src/main/scala/Main.scala

@@ -10,7 +10,7 @@ import compiler.Tokenizer._
 import compiler.Parser._
 
 
-@main def hello(): Unit =
+@main def main(): Unit =
   println("Hello world!")
   println(msg)
   run_server()
@@ -44,8 +44,11 @@ def run_server(): Unit =
       case _ => s"{\"error\": \"Incorrect json request body\"}"
     }
 
+
+    println(s"Responding with: ${response}")
     // Send response to the client
-    out.println(response);
+    out.println(response)
+    out.close()
 
 def compile(source: String): String =
   val tokens = Tokenizer.tokenize(source)

compiler/src/main/scala/Parser.scala

@@ -4,15 +4,15 @@ import scala.util.{Try, Success, Failure}
 
 import compiler.Tokenizer.{Token, TokenType}
 
-sealed trait Expression:
+sealed abstract class Expression:
   //override def toString() = s"${this.getClass.getName.stripPrefix("compiler.Parser.")}($this)"
   override def toString() = s"Expression(TODO)"
 
 
-class Literal(value: Int | Boolean) extends Expression
-class Identifier(name: String) extends Expression
-class BinaryOperator(left: Expression, operator: String, right: Expression) extends Expression
-class Other() extends Expression
+case class Literal(value: Int | Boolean) extends Expression
+case class Identifier(name: String) extends Expression
+case class BinaryOperator(left: Expression, operator: String, right: Expression) extends Expression
+case class Other() extends Expression
 
 class Parser(tokens: List[Token]):
   // Keeps track of current token, index to tokens: List[Token]